Stocks X, Y, Z are currently traded at Px = $10, Py = $20, and P2 = $30. Their standard deviations of the returns are o x = 8%, y = 20%, and oz = 14%. The return correlations between: [1] X and Y is 0.6, [2] X and Z is -0.2, and (3] Y and Z is 0.5. 1 a. [1pt) What is the standard deviation of the returns of the equal weighted portfolio of Stock X and Y? b. [1pt) What is the standard deviation of the returns of the price-weighted portfolio of Stock X and Z